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3 years ago

Pitch is produced by what??

Chemistry

1 answer:

madam [21]3 years ago

6 0

Answer:

Pitch, in the chemical-process industries, the black or dark brown residue obtained by distilling coal tar, wood tar, fats, fatty acids, or fatty oils.

Explanation:

hopes it helps you☺

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if you are given one element name and % by mass, how do you find the other element in the compound? give example plz

Marta_Voda [28]

The percentage of elements in the compound is determined from the number of elements in the compound

<h3>Further explanation </h3>

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements

$\tt \%A~in~A_xB_y=\dfrac{x\times Ar~A}{MW~A_xB_y}\times 100\%$

$\tt \%B~in~A_xB_y=\dfrac{y\times Ar~B}{MW~A_xB_y}\times 100\%$

Example

% Lithium (Li) in Li₂CO₃(lithium carbonate)

Ar of Li = 6.941 g/mol

MW of Li₂CO₃ = 73.891 g/mol

$\tt \%Li=\dfrac{2.Ar~Li}{MW~Li_2CO_3}\times 100\%\\\\\%Li=\dfrac{2\times 6.941}{73.891}\times 100\%=18.79\%$

6 0

3 years ago

How many grams of lithium fluoride is required to make 1.2 L of a 3.5 M<br> solution?

DerKrebs [107]

Answer:

109.2g

Explanation:

First, let us obtain the number of mole of lithium fluoride in the solution. This is illustrated below:

Molarity of lithium fluoride (LiF) = 3.5M

Volume = 1.2L

Number of mole of LiF =?

Molarity = mole/Volume

Mole = Molarity x Volume

Number of mole LiF = 3.5 x 1.2

Number of mole LiF = 4.2 moles

Now let us convert 4.2 moles to grams in order to obtain the desired result. This illustrated below:

Molar Mass of LiF = 7 + 19 = 26g/mol

Number of mole of LiF = 4.2 moles

Mass of LiF =?

Mass = number of mole x molar Mass

Mass of LiF = 4.2 x 26

Mass of LiF = 109.2g

Therefore, 109.2g of lithium fluoride is required.

8 0

3 years ago

How many grams of Al2O3are present in 7.1 x 10^22 molecules of Al2O3?

Alexus [3.1K]

Answer:

13.4g

Explanation:

we know that:

1 mole = 6.02 × 10²³ atoms

make the unknown number of moles = x

x = 7.1 × 10²² atoms

putting them both together:

1 mole = 6.02 × 10²³ atoms

x = 7.1 × 10²² atoms

Cross multiply:

6.02 × 10²³ x = 7.1 × 10²²

divide both sides by 6.02 × 10²³

$x = \frac{7.1 \times 10²² }{ 6.02 × 10²³}$

$x = \frac{71}{602}$

we now have the number of moles of Al₂CO₃

to calculate the grams (mass):

$moles = \frac{mass}{relative \: formula \: mass}$

$mass = moles \: \times \: relative \: formula \: mass$

add up all of the atomic masses of Al₂CO₃ to calculate relative formula mass:

(27 × 2) + 12 + (16 × 3) = 114

the grams (mass) of Al₂CO₃:

$\frac{71}{602} \times 114 = 13.4g$

5 0

3 years ago

HELP ASAP ILL GIVE BEST ANSWER BRAINLIEST!

creativ13 [48]

Answer:

Your answer will be lunar eclipses occur more often than solar eclipses, and totality can last for about an hour.

4 0

3 years ago

How many grams of sodium hydroxide are needed to completely react with 50.0 grams of H2SO4?

Goryan [66]

Answer:

48.0 grams of NaOH I believe

3 0

3 years ago

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Pitch is produced by what??​

Pitch is produced by what??